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NITED STATES ATENT arrest.

CHARLES C. OLAUSEN, OF NEW YORK, N. Y.

FURNACE FOR MALT-KILNS.

SPECIFICATION forming part of Letters Patent No. 370,931, dated October 4, 1887.

Application filed November 8, 1886. Serial No. 218,230. (No model.)

To all whom it may concern:

Be it known that I, CHARLES C. CLAUSEN, of the city, county, and State of New York, have invented certain new and useful Improvements in Furnaces for Malt Kilns, of which the following is a specification.

In the malt-kilns in general use the malt is dried by the hot air which passes with the gases of combustion through the malt on the kiln-floors. When the fires in the furnaces are raked up preparatory to charging the furnaces with additional fuel, the ashes and cinders are carried along with the hot air, and are retained in the moist malt, they, together with the sulphurous fumes and smoke, forming an objectionable admixture to the malt, whereas the cinders expose the malt-house to the danger of fire.

This invention is intended to so improve the furnaces of maltkilnsthat the passage of ashes and cinders to the kiln-floors is prevented when thefire is raked up, and that the ashes and cinders are conducted through auxiliary flues to the chimney; and the invention consists of a furnace for malt-kilns which is provided at the upper part with adamper that is operated by a lever and chains, and a lateral conducting-flue below said damper, which flue is closed by a hinged gate that is connected to the damper in such a manner that when the damper is closed the gate is open, and vice versa. s

In the accompanying drawings, Figure 1 represents a front elevation, with a part broken away, of my improved furnace for maltkilns. Fig. 2 is a vertical transverse section through the furnace, and Fig. 3 is a horizontal section on line a a), Fig. 1.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the fire-place of my improved furnace for maltkilns,which furnaces are preferably arranged in pairs, the rear parts of which abut against a common partition-wall, as shown in Fig. 3, above which fire-place is arranged a'vertical shaft that is open at the upper end. The fur-4 naces are separated from each other by intermediate air-spaces, a, between the side walls of the furnaces, so as to utilize the heat of said walls for heating the air that rises in said airspaces, and is thus conducted to the kilnfioors. The same air spaces are arranged alongside of the outer walls of the furnaces, as customary in furnaces of this class. The air supplied to the furnaces and the separatingspaces is heated up by the fire in the fireplaces and conducted with the products of combustion to the malt-kilns located above said furnaces. A hood, B, of non-combustible material, is supported above the upper part of the furnaces, and serves as a deflector for the heated air and gases of combustion, so that they are distributed in a uniform manner to the kiln-floors.

The parts so far described are old and well known, and I do not lay any claim to the same.

My improvement in furnaces for malt-kilns consists more especiallyin the arrangement of a damper, O, at the upper part of the furnace, which damper rests, when in horizontal position, on a side strip or ledge, d, at one side wall of the furnace. One pivot of the damper O is provided with a lever, e, that is located in the same plane with the damper, and provided at both ends equidistantly from the pivot with pending chains f f, by which the damper can be readily set into vertical or horizontal position, as required. Below the damper G is ar*' ranged in each furnace a lateral auxiliary flue, D, which communicates with a main flue, D, that leads to a chimney. All the lateral fines of a group of furnaces communicate with the same main flue D, as shown in Fig. 3. Each lateral flue is closed by a drop gate or valve, E, which is hinged to the wall of the furnace above the flue D, the lower end of said gate being connected by a chain, 9, or other means to one end of the damper O, as shown clearly in Figs. 1 and 2. When the fire in the furnace is in its normal condition, the damper O and thereby the drop-gate E automatically raised, as shown in Fig. 2, so that the hot air ICO and products ofcombustion pass,together with the ashes and cinders, through the lateral flue and main flue to the chimney, as indicated by arrows in Fig. 2. \Vhen the fire has been supplied with new fuel, the damper O is replaced in vertical position again and the auxiliary flue elosed,whereby the furnace is restored to its normal condition.

The advantages of my auxiliary flues, gates, and dampers are, that malt of a superior quality is obtained, as it is not deteriorated by the admixture of smoke, sulphurous gases, ashes, and cinders, and that the danger of fire to malt-kilns is greatly diminished.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- In a furnace for malt-kilns, the combination of a fire-place having an upright shaft open at the upper end, a centrally pivoted damper 2c arranged at the upper part of said shaft, means for operating said damper, adamper-supporting ledge at one side wall of the shaft, a lateral flue below said damper, a main flue connecting with said lateral flue, a hinged drop gate 25 or valve adapted to close said lateral flue, and

a chain connecting the dr0p-gate with that end of the damper opposite the ledge, substantially as shown and described.

In testimony that I claim the foregoing as 30 my invention I have signed my name in presence of two subscribing witnesses.

I CHAS. O. OLAUSEN.

Witnesses:

PAUL GOEPEL, SIDNEY MANN. 

